officials his sons were innocent and tamerlan said no contact with radicals in dagestan. extremists there claimed the same. there are different reasons for him going, conflicting timelines of where he was and who he was with. a lot of focus on one of the mosquit mosque. they believe in fact he did make contact with extremists. again no hard evidence of that contact. at least during the time he was in that dagestan city he had exposure to radicalism. there was several clashes between islamist troops demanding independence for dagestan from russia. no hard evidence again but circumstantial evidence of the significance of this trip before, by all accounts he had turned much more conservative in his islamic beliefs. after that it all ratcheted up. after the trip he spoke out at a local moderate boston mosque, started posting islamic videos on his youtube site and allegedly started to make preparations for that boston attack along with his surviving brother dzhokhar. jon: perhaps there will be time to answer the question in the days ahead. the father moved his family here clai